3.2 Method of Groundwater Pollution Source Intensity
Rating and Evaluation for Typical Groundwater
Pollution Studies
3.2.1 Indicator System for Rating and Evaluation
of Groundwater Pollution Source Intensity
The indicator system for rating and evaluation of groundwater pollution source
intensity mainly considers the characteristics of pollution sources and the characteristics of vadose zone (Xi 2016). Based on preceding analysis, the characteristics
of pollution sources are mainly reflected in the amount of discharge and mode of
Table 3.1 Indicator library for groundwater pollution source intensity evaluation
Indicators
Primary indicators
Secondary indicators
Characteristic indicators
of pollution sources
Form of pollution
sources
Point sources, line sources, area sources
Type of pollution
sources
Potential sources, existing sources
Characteristic
pollutant
properties
Toxicity, migration, degradability,
solubility
Location of
discharge
Land surface, vadose zone, aquifer
Pollution source
intensity
Amount of discharge, concentration of
discharge
Pollution pathway
Intermittent infiltration, continuous
infiltration, overflow and runoff
Affected area
Pollution source area, evaluation area
Seepage control
measures
Seepage control, no seepage control
Time of discharge
Year
Characteristic indicators
of vadose zone
Depth to water
table
Maximum pollution thickness
Topography
Terrain slope
Impact of vadose
zone media
Cohesive soils, non-cohesive soils
Thickness of
rock-soil layer
Thickness of cohesive soil layer, thickness
of non-cohesive soil layer
Permeability of
rocks and soils
Permeability coefficient of saturated soils,
soil bulk density, water content
Adsorption of
rocks and soils
Adsorption coefficient
Degradability of
rocks and soils
Reaction rate of pollutants
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